Pot for hot metal, &amp;c.



E. G. SHERMAN.

POT FOR HOT METAL, 6w.

urmommu FILED APR. 1, 1011.

1,061,784. Patented May 13, 1913.

WITNESSES INVENTOR M074 (5. C. S W,

" W M Gu the following is a full, clear, and exact clebe accomplished.

ERWIN C. SHERMAN, 0F YOUNGSTOWN, OHIO.

POT FOR HOT METAL, 860.

Specification of Letters Patent.

Patented May 13, 1913.

Application filed April 1, 1911. Serial No. 618,429.

To all whom/it may concern:

Be it known that I, ERWIN C. SHERMAN, of Youngstown, Mahoning county,Ohio, have invented a new and useful Improvement in Pots for Hot Metal,&c., of which scription, reference being had to the accompanyingdrawings, forming part of this specification, in Which- Figure l is avertical section showing one form of pot embodying my invention; Fig. 2is a detail sectional view on the line II-II of Fig. 1; Fig. 3 is afragmentary sectional view showing a modified form of the invention;Fig. 4 is a sectional view on the line IV IV of Fig. 3; Fig. 5 is a viewsimilar to Fig. 3, but showing another modification.

My invention has relation to pets for holding hot material, and moreparticularly to pots such as are used for holding and conveying hotcinder or metal from blast furnaces or open hearth furnaces. Pots ofthis character are usually made of cast iron; and it has been found inpractice that after successive heating and cooling, or after continuedservice at high temperatures, the pot does not go back to its originalform on cooling. It has further been found that these pots often fail inservice by cracking at or somewhere near the zone where the top surfaceof the hot material comes in the pot. Cracking at this point appears tobe due to the fact that the metal below this line or zone is heated to ahigh temperature, while that above such line or zone is comparativelycool. This difference in temperature is particularly noticeable atnight, at which time the lower portion of the pot will glow while thetop portion remains black. After a time the continued heat swells thelower portion of the pot and cracking is the natural consequence.Whether the cause is that stated, it is a fact that the pots fail atthis point; and it is the purpose of my invention to increase the lifeof the pot and postpone or prevent this failure by equalizing theternperatures of the two portions of the pot. There are several ways inwhich this may In the form of my invention illustrated in Figs. 1 and 2,the upper portion of the pot 2 is provided on its outer surface with aplurality of projecting ribs 3, which extend considerably below the lineof hot material indicated by the line a-a. These ribs serve to providean increased heat radiating surface, which affects a more rapid coolingof the heated portion of the pot. The portions of the ribs above theline of hot material will be heated by the hot air rising from the lowerand more highly heated portions, as well as by conduction. Aconsiderable equalization of temperature is, therefore, offected and thelife of the pot prolonged. These ribs may he of various shapes or form;they may run up and down the pot as shown, or they may encircle the potor be disposed in any other suitable way. They may extend entirely tothe upper edge of the pot, or may terminate lower down, or they mayextend entirely from the top to the bottom of the pot.

4. designates the usual trunnion ring of the pot, and 5 the projectionsor brackets on th pot which rest upon the said ring.

The form of my invention shown in Figs. 3 and i is similar to that shownin Figs. 1 and 2, except that in addition to the ribs 3 I have alsoshown the pot as provided with a sheet metal casing or shield 6extending over the ribs. This shield may be of any suitable material,either formed as a separate piece and secured to the pot, or it may becast integral with the ribs. This shield forms a series of air spaces 7,whereby the heat radiated from the lower portion of the pot is held andcaused to heat the upper portion, thus causing a further equalization ofthe temperature.

In Fig. 5 I have shown another form of my invention in which the ribs 3are omitmade in the details thereof Without departtaining casing orshield; substantially as ing from the spirit and scope of myinvendescribed.

tion as defined in the appended claim. In testimony whereof, I havehereunto set What I claim is my hand.

A pot for hot material, having a plural- ERVVIN C. SHERMAN. ity of heatradiating projections extending Witnesses: above and below the hot metalline of the H. C. DITMANSEN, pot, and also having a surrounding heat-re-A. M. GALVIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. C.

